repaired · 2026 Q2
Electrical system: starter assembly
Risk. A starter motor that overheats can ignite nearby combustible material in the engine compartment, increasing the risk of a fire.
2020 BMW M340iProblems, recalls & complaints
NHTSA has logged 57 owner complaints about the 2020 BMW M340i, most often about the engine. It is covered by 10 safety recalls, and for recall 24V-576 the manufacturer reports only 87% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 26, 2026. Updated daily.
Complaints by system
Where the 2020 BMW M340i has problems
57 complaints grouped by the system owners reported.
42Engine
6Electrical system
4Engine and engine cooling
3Fuel/propulsion system
2Power train
2Tires
1Service brakes
1Wheels
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Engine | 42 | 0 |
| Electrical system | 6 | 0 |
| Engine and engine cooling | 4 | 0 |
| Fuel/propulsion system | 3 | 0 |
| Power train | 2 | 0 |
| Tires | 2 | 0 |
| Service brakes | 1 | 0 |
| Wheels | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
10 recalls
2020 BMW M340i recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2025 Q3
Electrical system: software
Risk. An audible chime that does not properly alert the driver to fasten their seat belt increases the risk of injury in a crash.
repaired · 2025 Q1
Seats
Risk. An improperly welded seat frame may not properly restrain the occupant during a crash, increasing the risk of injury.
repaired · 2023 Q2
Engine
Risk. Loss of braking assist can increase the risk of a crash.
Show 6 more recalls
repaired · 2023 Q1
Sensing system: camera
Risk. If the driver relies on only the rearview camera image, the missing or reduced rearview image view can increase the risk of a crash or injury.
repaired · 2022 Q2
Linkages: tie rod assembly
Risk. A damaged or fractured tie rod may affect vehicle handling and control, increasing the risk of a crash.
repaired · 2022 Q1
Air bags
Risk. If the air bag and/or seat belt pretensioners deploy improperly in the event of a crash, there is an increased risk of injury to the driver and front passenger.
repaired · 2021 Q1
Body: trunk lid
Risk. If a person were inside the trunk compartment, they may not be able to get out, increasing their risk of injury.
repaired · 2021 Q1
Sensing system: camera
Risk. The lack of an image in the back-up camera display increases the risk of a crash.
repaired · 2019 Q3
Seats
Risk. If the headrest folds down in a crash, there would be an increased risk of injury.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with BMW.
Owner-reported costs
What owners say repairs cost
Dollar amounts owners wrote in their complaints when describing a repair or a quote. These are not price estimates; a system is shown only when at least 8 owners mentioned a cost.
Engine
8 owners mentioned a cost$8,000median
Middle half: $6,500 – $8,000
If a problem is covered by a recall, the dealer fixes it for free. Some manufacturers also reimburse owners who paid for a repair before a recall was announced.
Best & worst years
2020 vs. every other M340i year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the M340i median. How we score
'19'20'21'22'23
- Avoid
- Caution
- Solid
- Best
- Not rated
In owners' words
What M340i owners report
Recent engine complaints filed with NHTSA, shortened. Personal details are removed.
I am reporting a safety concern involving BMW vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found in model years 2019–2021. These vehicles utilize a variable-displacement engine oil pump containing an internal thermoplastic adjusting component responsible for regulating…
I'm reporting a safety issue with BMW vehicles equipped with the B58TU engine, primarily 2019-2021 models. These vehicles have an oil pump with an internal plastic component that regulates oil pressure, and this part is fracturing in the field, causing sudden loss of oil pressure. The failure…
Plastic components in the oil pump went out. BMW has made new oil pumps with metal components that are less fragile and do not fail as often. Outside of warranty these repairs can be very costly. I have had to pay out of pocket for these repairs myself. I do not understand why this is not a recall.
Own a 2020 M340i?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.